Date
May 12, 2025, 11:48 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.028523] ================================================================== [ 19.028587] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 19.028643] Read of size 1 at addr fff00000c78896d0 by task kunit_try_catch/259 [ 19.028696] [ 19.028728] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT [ 19.028814] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.028844] Hardware name: linux,dummy-virt (DT) [ 19.028876] Call trace: [ 19.028901] show_stack+0x20/0x38 (C) [ 19.028950] dump_stack_lvl+0x8c/0xd0 [ 19.028999] print_report+0x118/0x608 [ 19.029644] kasan_report+0xdc/0x128 [ 19.029704] __asan_report_load1_noabort+0x20/0x30 [ 19.029757] kasan_strings+0x95c/0xb00 [ 19.029850] kunit_try_run_case+0x170/0x3f0 [ 19.029996] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.030124] kthread+0x328/0x630 [ 19.030180] ret_from_fork+0x10/0x20 [ 19.030242] [ 19.030267] Allocated by task 259: [ 19.030300] kasan_save_stack+0x3c/0x68 [ 19.030345] kasan_save_track+0x20/0x40 [ 19.030384] kasan_save_alloc_info+0x40/0x58 [ 19.030425] __kasan_kmalloc+0xd4/0xd8 [ 19.030462] __kmalloc_cache_noprof+0x15c/0x3c0 [ 19.030501] kasan_strings+0xc8/0xb00 [ 19.030537] kunit_try_run_case+0x170/0x3f0 [ 19.030583] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.030630] kthread+0x328/0x630 [ 19.030927] ret_from_fork+0x10/0x20 [ 19.030977] [ 19.031000] Freed by task 259: [ 19.031029] kasan_save_stack+0x3c/0x68 [ 19.031160] kasan_save_track+0x20/0x40 [ 19.031249] kasan_save_free_info+0x4c/0x78 [ 19.031490] __kasan_slab_free+0x6c/0x98 [ 19.031533] kfree+0x214/0x3c8 [ 19.031686] kasan_strings+0x24c/0xb00 [ 19.031793] kunit_try_run_case+0x170/0x3f0 [ 19.031889] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.032036] kthread+0x328/0x630 [ 19.032142] ret_from_fork+0x10/0x20 [ 19.032365] [ 19.032460] The buggy address belongs to the object at fff00000c78896c0 [ 19.032460] which belongs to the cache kmalloc-32 of size 32 [ 19.032585] The buggy address is located 16 bytes inside of [ 19.032585] freed 32-byte region [fff00000c78896c0, fff00000c78896e0) [ 19.032646] [ 19.032670] The buggy address belongs to the physical page: [ 19.032704] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107889 [ 19.032758] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.032807] page_type: f5(slab) [ 19.032850] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.032901] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.032941] page dumped because: kasan: bad access detected [ 19.032975] [ 19.032995] Memory state around the buggy address: [ 19.033029] fff00000c7889580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.033085] fff00000c7889600: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.033129] >fff00000c7889680: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.033167] ^ [ 19.033205] fff00000c7889700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.033530] fff00000c7889780: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.033662] ==================================================================
[ 18.980965] ================================================================== [ 18.981893] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 18.982962] Read of size 1 at addr ffff888102327750 by task kunit_try_catch/276 [ 18.983756] [ 18.983915] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) [ 18.984083] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.984134] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 18.984194] Call Trace: [ 18.984237] <TASK> [ 18.984322] dump_stack_lvl+0x73/0xb0 [ 18.984399] print_report+0xd1/0x650 [ 18.984471] ? __virt_addr_valid+0x1db/0x2d0 [ 18.984512] ? kasan_strings+0xcbc/0xe80 [ 18.984550] ? kasan_complete_mode_report_info+0x64/0x200 [ 18.984585] ? kasan_strings+0xcbc/0xe80 [ 18.984619] kasan_report+0x141/0x180 [ 18.984652] ? kasan_strings+0xcbc/0xe80 [ 18.984725] __asan_report_load1_noabort+0x18/0x20 [ 18.984761] kasan_strings+0xcbc/0xe80 [ 18.984795] ? trace_hardirqs_on+0x37/0xe0 [ 18.984838] ? __pfx_kasan_strings+0x10/0x10 [ 18.984872] ? finish_task_switch.isra.0+0x153/0x700 [ 18.984911] ? __switch_to+0x47/0xf50 [ 18.984941] ? __schedule+0x10cc/0x2b60 [ 18.984966] ? __pfx_read_tsc+0x10/0x10 [ 18.984990] ? ktime_get_ts64+0x86/0x230 [ 18.985016] kunit_try_run_case+0x1a5/0x480 [ 18.985068] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.985108] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 18.985147] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 18.985184] ? __kthread_parkme+0x82/0x180 [ 18.985207] ? preempt_count_sub+0x50/0x80 [ 18.985231] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.985272] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.985305] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 18.985331] kthread+0x337/0x6f0 [ 18.985352] ? trace_preempt_on+0x20/0xc0 [ 18.985377] ? __pfx_kthread+0x10/0x10 [ 18.985399] ? _raw_spin_unlock_irq+0x47/0x80 [ 18.985422] ? calculate_sigpending+0x7b/0xa0 [ 18.985449] ? __pfx_kthread+0x10/0x10 [ 18.985471] ret_from_fork+0x116/0x1d0 [ 18.985491] ? __pfx_kthread+0x10/0x10 [ 18.985513] ret_from_fork_asm+0x1a/0x30 [ 18.985546] </TASK> [ 18.985561] [ 19.000206] Allocated by task 276: [ 19.000476] kasan_save_stack+0x45/0x70 [ 19.001092] kasan_save_track+0x18/0x40 [ 19.001451] kasan_save_alloc_info+0x3b/0x50 [ 19.002104] __kasan_kmalloc+0xb7/0xc0 [ 19.002483] __kmalloc_cache_noprof+0x189/0x420 [ 19.003605] kasan_strings+0xc0/0xe80 [ 19.003988] kunit_try_run_case+0x1a5/0x480 [ 19.004618] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.004857] kthread+0x337/0x6f0 [ 19.005394] ret_from_fork+0x116/0x1d0 [ 19.005780] ret_from_fork_asm+0x1a/0x30 [ 19.006143] [ 19.006280] Freed by task 276: [ 19.006468] kasan_save_stack+0x45/0x70 [ 19.006876] kasan_save_track+0x18/0x40 [ 19.007832] kasan_save_free_info+0x3f/0x60 [ 19.008108] __kasan_slab_free+0x56/0x70 [ 19.008299] kfree+0x222/0x3f0 [ 19.008911] kasan_strings+0x2aa/0xe80 [ 19.009460] kunit_try_run_case+0x1a5/0x480 [ 19.009770] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 19.010466] kthread+0x337/0x6f0 [ 19.010884] ret_from_fork+0x116/0x1d0 [ 19.011196] ret_from_fork_asm+0x1a/0x30 [ 19.011667] [ 19.011823] The buggy address belongs to the object at ffff888102327740 [ 19.011823] which belongs to the cache kmalloc-32 of size 32 [ 19.012860] The buggy address is located 16 bytes inside of [ 19.012860] freed 32-byte region [ffff888102327740, ffff888102327760) [ 19.013969] [ 19.014149] The buggy address belongs to the physical page: [ 19.014583] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102327 [ 19.015452] flags: 0x200000000000000(node=0|zone=2) [ 19.015662] page_type: f5(slab) [ 19.015962] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 19.016865] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.017721] page dumped because: kasan: bad access detected [ 19.018026] [ 19.018212] Memory state around the buggy address: [ 19.018543] ffff888102327600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.018880] ffff888102327680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.019594] >ffff888102327700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.020184] ^ [ 19.020726] ffff888102327780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.021630] ffff888102327800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.022326] ==================================================================